The keyword phrase "11 september 2025 hari" functions as a noun phrase. The core element and main point of this phrase is the word "hari," which is an Indonesian noun meaning "day." The specific date, "11 september 2025," acts as an adjectival modifier, specifying which particular day is the subject. Therefore, the essential part of speech for the main point is Noun.
In a grammatical analysis, the structure consists of a determiner/modifier ("11 september 2025") followed by the head noun ("hari"). This is a common construction in Indonesian and other languages where the specifying information precedes the general noun it describes. The date pinpoints a single, specific instance of the concept "day." The entire phrase operates as a single unit to name a specific point in time, fulfilling the role that a noun or proper noun would in a sentence.
For the purpose of an article, identifying the main point as a noun is crucial because it establishes the subject matter as a specific event, occasion, or entity (a particular day). Consequently, the article's content would revolve around describing, defining, or providing information about what makes this specific day significant. The grammatical function dictates that the topic is not an action (verb) or a quality (adjective) but a concrete concept: the day of September 11, 2025.